From: Dima Stepanov <dimas...@yandex-team.ru>
If the vhost-user-blk daemon provides only one virtqueue, but device was
added with several queues, then QEMU will send more VHOST-USER command
than expected by daemon side. The vhost_virtqueue_start() routine
handles such case by checking the return value from the
virtio_queue_get_desc_addr() function call. Add the same check to the
vhost_dev_set_log() routine.
Signed-off-by: Dima Stepanov <dimas...@yandex-team.ru>
Reviewed-by: Raphael Norwitz <raphael.norw...@nutanix.com>
Message-Id:
<6232946d5af09e9775076645909964a6539b8ab5.1599813294.git.dimas...@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
hw/virtio/vhost.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 60bc516003..68f0a75134 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -835,12 +835,24 @@ out:
static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log)
{
int r, i, idx;
+ hwaddr addr;
+
r = vhost_dev_set_features(dev, enable_log);
if (r < 0) {
goto err_features;
}
for (i = 0; i < dev->nvqs; ++i) {
idx = dev->vhost_ops->vhost_get_vq_index(dev, dev->vq_index + i);
+ addr = virtio_queue_get_desc_addr(dev->vdev, idx);
+ if (!addr) {
+ /*
+ * The queue might not be ready for start. If this
+ * is the case there is no reason to continue the process.
+ * The similar logic is used by the vhost_virtqueue_start()
+ * routine.
+ */
+ continue;
+ }
r = vhost_virtqueue_set_addr(dev, dev->vqs + i, idx,
enable_log);
if (r < 0) {
--
MST
